Help! I have a 1991 Johnson 9.9 and I am removing the powerhead to clean/repair the upper water tube. I have the manual and have followed all instruction without any problems. All bolts on bottom (6) and nuts/washers on top (3) came out without a problem as well. However the powerhead will not come loose. Are there more bolts/nuts someplace I am missing? Or do I just need to tap harder to break free? How aggressive can I be with prying/banging? Any trade tricks or ideas would be greatly appreciated...<br />Thanks, Rob